CA1315356C - Filtre adaptatif numerique et methode de convergence utilisee par celui-ci - Google Patents
Filtre adaptatif numerique et methode de convergence utilisee par celui-ciInfo
- Publication number
- CA1315356C CA1315356C CA000606172A CA606172A CA1315356C CA 1315356 C CA1315356 C CA 1315356C CA 000606172 A CA000606172 A CA 000606172A CA 606172 A CA606172 A CA 606172A CA 1315356 C CA1315356 C CA 1315356C
- Authority
- CA
- Canada
- Prior art keywords
- unit
- echo
- main memory
- main
- submemory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H21/00—Adaptive networks
- H03H21/0012—Digital adaptive filters
- H03H21/0043—Adaptive algorithms
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18056588A JPH0230225A (ja) | 1988-07-20 | 1988-07-20 | ディジタルアダプティブフィルタ |
JP63-180565 | 1988-07-20 | ||
JP01-111664 | 1989-04-28 | ||
JP11166489A JPH02288718A (ja) | 1989-04-28 | 1989-04-28 | 適応型ディジタルフィルタの収束方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1315356C true CA1315356C (fr) | 1993-03-30 |
Family
ID=26451006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000606172A Expired - Fee Related CA1315356C (fr) | 1988-07-20 | 1989-07-19 | Filtre adaptatif numerique et methode de convergence utilisee par celui-ci |
Country Status (3)
Country | Link |
---|---|
US (1) | US5007044A (fr) |
EP (1) | EP0351843A3 (fr) |
CA (1) | CA1315356C (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0344218A (ja) * | 1989-07-12 | 1991-02-26 | Fujitsu Ltd | 適応形エコーキャンセラ |
US5146494A (en) * | 1989-07-31 | 1992-09-08 | At&T Bell Laboratories | Overlapping look-up-and-add echo canceller requiring a smaller memory size |
US5245561A (en) * | 1990-12-27 | 1993-09-14 | Nec Corporation | Adaptive filter capable of quickly identifying an unknown system |
US5418778A (en) * | 1992-02-14 | 1995-05-23 | Itt Corporation | Local and remote echo canceling apparatus particularly adapted for use in a full duplex modem |
US5295136A (en) * | 1992-04-13 | 1994-03-15 | Motorola, Inc. | Method of performing convergence in a, least mean square, adaptive filter, echo canceller |
US5329586A (en) * | 1992-05-29 | 1994-07-12 | At&T Bell Laboratories | Nonlinear echo canceller for data signals using a non-redundant distributed lookup-table architecture |
US5390364A (en) * | 1992-11-02 | 1995-02-14 | Harris Corporation | Least-mean squares adaptive digital filter havings variable size loop bandwidth |
US5471527A (en) * | 1993-12-02 | 1995-11-28 | Dsc Communications Corporation | Voice enhancement system and method |
US5896449A (en) * | 1993-12-02 | 1999-04-20 | Alcatel Usa Sourcing L.P. | Voice enhancement system and method |
DE4430189A1 (de) * | 1994-08-25 | 1996-02-29 | Sel Alcatel Ag | Verfahren zur adaptiven Echokompensation |
JPH08265224A (ja) * | 1995-03-22 | 1996-10-11 | Nec Corp | エコーキャンセラ |
US5978473A (en) * | 1995-12-27 | 1999-11-02 | Ericsson Inc. | Gauging convergence of adaptive filters |
JP2000209135A (ja) * | 1999-01-20 | 2000-07-28 | Oki Electric Ind Co Ltd | エコ―キャンセラ |
JP2000252881A (ja) * | 1999-02-25 | 2000-09-14 | Mitsubishi Electric Corp | ダブルトーク検知装置並びにエコーキャンセラ装置およびエコーサプレッサー装置 |
WO2000065791A1 (fr) * | 1999-04-22 | 2000-11-02 | Broadcom Corporation | Giga-ethernet avec decalages de synchronisation entre paires torsadees |
EP2267913A3 (fr) * | 2000-01-25 | 2012-10-10 | Aware, Inc. | Système et procédé pour l'application d'un algorithme LMS pour actualisation d'un annuleur d'écho dans un modem ADSL |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE426765B (sv) * | 1981-11-02 | 1983-02-07 | Ellemtel Utvecklings Ab | Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem |
FR2528643A1 (fr) * | 1982-06-14 | 1983-12-16 | Trt Telecom Radio Electr | Procede destine a reduire le temps de convergence d'un annuleur d'echo et dispositif utilise pour mettre en oeuvre ce procede |
US4605826A (en) * | 1982-06-23 | 1986-08-12 | Nec Corporation | Echo canceler with cascaded filter structure |
JPS59211338A (ja) * | 1983-05-17 | 1984-11-30 | Nec Corp | エコ−キヤンセラ−装置 |
CA1238381A (fr) * | 1985-03-14 | 1988-06-21 | Ephraim Arnon | Elimination d'echos multi-etage |
DE3515832A1 (de) * | 1985-05-02 | 1986-11-06 | Siemens AG, 1000 Berlin und 8000 München | Hybrider echokompensator |
US4811342A (en) * | 1985-11-12 | 1989-03-07 | Racal Data Communications Inc. | High speed analog echo canceller |
NL8600817A (nl) * | 1986-03-28 | 1987-10-16 | At & T & Philips Telecomm | Adaptief filter voor het vormen van een echokompensatiesignaal in een zend-ontvangstelsel voor het in duplexvorm bedrijven van digitale communicatie over een enkel geleiderpaar. |
US4868874A (en) * | 1986-04-18 | 1989-09-19 | Hitachi, Ltd. | Echo canceller |
JPS62291223A (ja) * | 1986-06-10 | 1987-12-18 | Nec Corp | アダプテイブ・フイルタ適応化方法及び装置 |
US4823382A (en) * | 1986-10-01 | 1989-04-18 | Racal Data Communications Inc. | Echo canceller with dynamically positioned adaptive filter taps |
JPH0779290B2 (ja) * | 1987-01-13 | 1995-08-23 | 日本電気株式会社 | エコ−除去装置 |
-
1989
- 1989-07-19 CA CA000606172A patent/CA1315356C/fr not_active Expired - Fee Related
- 1989-07-20 EP EP19890113338 patent/EP0351843A3/fr not_active Withdrawn
- 1989-07-20 US US07/382,413 patent/US5007044A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0351843A2 (fr) | 1990-01-24 |
EP0351843A3 (fr) | 1990-12-19 |
US5007044A (en) | 1991-04-09 |
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JPH0738563B2 (ja) | アダプティブ・フィルタ適応化方法及び装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKLA | Lapsed | ||
MKLA | Lapsed |
Effective date: 19970401 |